I don't really feel anything in my hamstrings when doing these. In regards to bringing my chest up, is it ok to lean forward on the negative but bring my chest up on the positive?
Well, you need to lean forward at the bottom. As you lean forward, if your shins remain relatively vertical, your ass will stick out. This is what stretches your hamstrings at the bottom and facilitates the rebound.
Notice how in a low bar squat the factor by which the hips extend the hamstrings is a function of back angle; the more vertical the back, the more the hamstrings slacken.
My god I feel incapable of increasing my deadlifts. Started a few months ago based on recommendations here in order to help my incredibly weak lower back that was painful as hell. Started super light at 95lbs and now able to do 5 x 185lbs on a good day. Been stuck there for weeks. I legit feel I can't go any heavier because my back will just inadvertently curve and do a shitty lift.
Essentially I'm Asking: what have u guys done when you've hit a plateau? Should I go for higher reps at a lower weight to get myself more used to it? Go 1 or maybe 2 reps at a higher weight to start off my training?
This is how I go about lifting:
8x135lbs (2 sets)
5x 155lbs ( 2 sets)
5 x 175lbs (1 set )
3 x 185lbs ( 1 set)
It's probably a form issue compounded by not enough food.
Reset back to 155lb or so and do a linear progression (add 10lb per session to your final work set). Do just 1 set of 5 with that weight that session; deadlift are tough to recover from. What you posted is a fuckton of volume that might be doing you more harm than good. You are burnt out by the time you get to your work set.
Your session should sort of work like this:
(Assuming a 185lb work set):
45lbx10
135lbx5
160lbx3
185lbx5